h1{
    color: black;
    font-size: 30px;
}
.center {
    text-align: center;
    border : darkorange;
    width: 50%;
}
.center_2{
    text-align: center;
    border :  black;
}
.left {
    text-align: left;
    border:  black;
    width: 50%;
}
.right{
    text-align: right;
    width: 50%;
}
.p2{
    color: darksalmon;
}
.p3{
    color: springgreen;
}
.p1{
    color:white;
    font-size: 20px;
}
.p1,.p2{
    text-align: center;
    width: 100%;
}
.demo{

    position:fixed;

    top: 0;

    left: 0;

    width:100%;

    height:100%;

    min-width: 1000px;

    z-index:-10;

    zoom: 1;

    background-color: #fff;

    background: url(2.png);

    background-repeat: no-repeat;

    background-size: cover;

    -webkit-background-size: cover;

    -o-background-size: cover;

    background-position: center 0;

}
.left_2{
    text-align: left;
}
.yellow{
    color: darkorange;
}
.red{
    color: red;
}